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Development and Study of a Non-Destructive Testing System with Terahertz Radiation
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Resumo(s)
Continuous wave terahertz imaging is a variant of terahertz imaging that has been
made possible with recent advances in technology and has provided interesting results
as an inspection method. This variant is more accessible than its counterparts, as such,
there is high interest in studying it. This dissertation aims at providing the foundations
for the development and use of this technology for Non-Destructive Testing.
The system was assembled and tested for different applications. The fundamental
phenomena were studied through experimentation and numerical simulations. A mathematical model was developed to predict the effects of Fabry-Perot interference, a phenomenon that would otherwise be considered undesirable. The comprehension of this
effect allows for this method to be used as measuring tool. The system was compared
with other non-contact inspection techniques, where it was found to excel at imaging
water infiltrations and some composite materials.
Descrição
Palavras-chave
Terahertz Continuous-Wave Imaging Non-Destructive Testing Fabry-Perot